Street-car motor



ritira raras y PATENT ritten.

VILBURT O. TRUSSELL, OF BOSTON, MASSACHUSETTS.

STREET-CAR MOTOR.

Application iled February 16, 1885 To @ZZ whom, t may concern:

Be it known that I, WILBURT C. TRUssELL, a citizen of the United States, residing at Boston, in the county of Suffblk and State of Massachusetts, have invented a new and useful Improvement in StrectCar Motors, of which the following is a speciiication.

The object of my invention is to produce a simple and efficient arrangement of mechanism for propelling` street-railway cars by manual power, thereby dispensing with horse or other power.

The invention consists in securing to each axle of the car a worm-wheel, either of which can be caused to rotate (according to the direction of the car) by means of aworm mounted upon one end of a shaft supported by suitable bearings under the car, which shaft is caused to rotate by means of a chain passing around a small sprocketwheel on the outer end of the shaft and around a large sprocket wheel mounted on a suitable frame `on the platform of the car, the large sprocket-wheel being provided with a handle, so as to be turned by the driver of the car.

'The invention further consists in the employment of a series of loose pulleys, around which the chain is passed for obtaining greater power` and suitable means for throwing the worm in and out of gear with the wormwhcel on the rear axle are also described.

Referring to the accompanying drawings, Figure l represents a longitudinal vertical section of a streetrailway car embodying my invention. Fig. 2 is a transverse vertical section of the same, taken on line :t :c of Fig. 1.

A represents a portion of a street-railway car, B the axle, and C the wheel. On the axle Bis secured a worm-wheel, D, and in suitable bearings, e c, secured to the under side of the car'loor is mounted a shaft, E, upon which is secured a worm, F, that gears with the wormwhecl D. On the outer end of the shaft E is mounted a small sprocketaii'heel, G. To the platform of the car is secured a frame, H, in which is supported a large sprocket-wheel, I, and to the platform is also secured a standard, J, to which two loose pulleys, K and L, are secured. An endless chain, M, is passed over the large sprocket-wheel I and under the small sprocketwheel G, then up and over the loose pulley K, and down under the loose pul Serial No. 156,105.

.'EECEFICATE^N Iarming part of Letters Patent No. 327,623, dated October 6, 1885.

(No model.)

ley L, then up to the large sprocket-wheel I, Which is fitted with an adjustable handle, t'.

The rear bearing, e, of the shaft E is free to slide in a dovetail groove in a block,f, secured to the bottom of the ear, and is pushed backward or forward by means of a lever, N, shown in the drawings as passing up under the seat, but which may be made to pass out to the side of the ear, so that when the bearingeis pushed back that end of the shaft will be raised and the worin F lifted out of gear with the worm-wheel D, and when again pushed forward will fall into gear with the same; but any other device for throwing the worm F in and out of gear with the worinwheel D may be employed.

Upon turning the sprocket-wheel I by the handle t' in the direction ofthe arrow marked l the chain M is drawn in the direction of the arrows marked 2 2, the chain on this side being always kept taut, while it is slightly slack on the opposite side, where the arrows are marked 3 3. Great power is obtained by the chain passing around the loose pulleys K L, as described, without any diminution of speed. The small sprocket-wheel G, and with it the shaft E, is thus caused to malte several revolutions to one of the large sprocket-wheel I, and for every revolution of the shaft E the worm F moves the worm-wheel D one tooth, so that if the worm-wheel D has twelve teeth, as shown, twelve revolutions of the shaft E will be required to revolve the wheel D once, and should the proportions of the wheels I and G be as six to one, then the wheel C of the car will revolve once for every two revolutions of the wheel I.

When the car has arrived at the end of its journey, the worm F is thrown out of gear with the worm-wheel D by means of the handlever N, and the other worm thrown into gear with the worm-wheel on the other axle, when the car will be ready to st-art in the opposite direction.

For cars that are to work on level ground the chain M need only to pass around the large and small sprocket-wheels, thereby dispensing with the loose pulleys K and L and the standard J.

lVhen it is desired to stop the car, the driver has only to leave off turning the handle i, and the worm F will prevent the worin-wheel D IOO from revolving, so that the usual brakes will In testimony whereof I'have signed my name ro not be required when the car is fitted with my to this specification in the presence of two subinvention. scribing Witnesses.

What I claim as my invention is- In combination with the axle of a street- WILBURT C. TRUSSELL. railway car, the Worm-Wheel D, Worm F, shaft i E, sprocket-wheels G and I, and chain M, substantially as shown, and for the purposes de- Wil nesses:

J. H. ADAMS,

scribed. E. PLANTA. 

